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Operating Units Other Segments (Details) (USD $) In Millions, unless otherwise specified |  |  | 0 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 30, 2014 Real Estate Segment [Member] real_estate_properties | Dec. 31, 2013 Real Estate Segment [Member] | Oct. 02, 2013 New ARL [Member] [Member] Railcar Segment [Member] | Jun. 30, 2014 ARI [Member] | Jun. 30, 2014 Viskase [Member] distribution_centers manufacturing_facilities | Jun. 30, 2014 MASSACHUSETTS Real Estate Segment [Member] real_estate_property_units | Jun. 30, 2014 FLORIDA Real Estate Segment [Member] real_estate_property_units
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Percentage of equity ownership in subsidiary |  |  | 75.00% | 55.60% | 73.50% |  |
Nnumber of Manufacturing Facilities |  |  |  |  | 9 |  |
Number of Distribution Centers |  |  |  |  | 9 |  |
Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries, Percentage |  |  |  |  | 72.00% |  |
Number of Real Estate commercial rental properties | 29 |  |  |  |  |  |
Number of units of residential housing in future development |  |  |  |  |  | 271 | 1,325
Pledged assets | $ 55 | $ 56 |  |  |  |  |

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